Abstract: The stackable modular element for a flow divider unit for a hydraulic circuit has a flow regulator with a piston controlling an opening as a function of the variations in the pressure upstream between the fluid input and output. The internal cylinder of the regulator piston (11, 111, 211) opens, on the one hand, onto a stacking face of the element and, on the other, into the exit hole (5, 105, 205) of the element, passing through its entry hole (3, 103, 203) and communicates, via the said stacking face, with a passage (12, 112, 212) for equalization of output pressures traversing the element between its stacking faces and connecting them with the corresponding passages in the adjoining units, the equalization passage communicating, in addition, with the exit hole (5, 105, 205) of the element.